Improvement in anchors



A. H.. COBB.

` Anchors. No.l5l,276 ParentedMay 26,1874.

ATTUBNEYS.

UNITED STATES PATENT OFFICE.

ALPHONSO H. COBB, OF DETROIT, MICHIGAN.

IMPROVEMENT IN ANCHORS.

Specification forming part of Letters Patent No. 151,276, dated May 26, 1874; application led April i1, 1874.

To all whom it may concern:

Be it known that I, ALPHoNso H. COBB, of Detroit, in the county ot' Wayne and State of Michigan, have invented a newand Improved Anchor, of which the following is a specification:

In the accompanying drawing, Figure l represents a top View; Fig. 2, a side elevation,

partly in section, on the line c o, Fig. l and Fig. 3, a diagram of the pivot-connection of arms and shank.

Similar letters of reference indicate corresponding parts.

The invention will first be fully described, and then pointed out in the claim.

In the drawing', A represents the arms, B` the flukes, C the shank, and D the stock, of my improved anchor. The flukesB of my anchor are not parallel to the body of the shank, as in the common form of the anchors in use, but are placed in one plane with the arms and stock, which plane is vertical to the body of the shank C. The stock D is the iron one now in common use, capable ot' being swungparallel to shank, or being detached, it' necessary. A wedge-'shaped lug or projection, A', is wrought in one piece with arms A, extending centrally between the same, but in a'plane vertical to them and parallel to the body ofthe shank. Its narrower sides taper down to the diameter of the arms, while the angle of its pointed end is, preferably, one of sixty-rive degrees. Lug A is pivoted, by a bolt, a, of suitable strength, to the lower re cessed end of shank C, bolt a being firmly attached by means of its head a and screwmut b. Lug A swings in the recess d of the shank, under an angle of about one hundred and fifty degrees, between two side projections, d', which dene the extent of motion of thelug and arms, the inner sides of the same being produced, preferably, under anA angle of ten degrees, the lower sides under an angle of seventy-five degrees to the symmetrical axis of the shank, as indicated in Fig. 3,. In each position of the arms, whether turned to one side or the other of the shank, the lug A comes, by its wedge-shaped end, in contact with the lower side of one projection, d, and the inner side of the opposite projection d', as shown in Fig. 2; and these projections, together with the pivot-bolt, take up the strain when the arms are buried in the ground.l The anchor will take hold of the ground into whatever position it may be dropped. If the same falls in the simplest and most common position, with the arms and stock dat to the bottom, the strain of the cable on the stock causes, by the weight of the shank and flukes, the entering of the latter in inclined position into the bottom until the wedge-shaped lug engages the bearing-surf aces of the side projections, as set forth. In the second case, if the anchor -were to fall on one fluke, the stock would be perpendicular, and the strain on the cable would draw the stock down flat on the bottom and produce the entering' of the arms, as before. Lastly, if the crown were struck,

the tautening of the cable would cause the anchor to occupy one of the above-named posit-ions, with the same result.

Besides the increased facility and certainty of the workin g of the anchor, there is another advantage, that of its easy storage and trans portation. The stock can be laid parallel or detached; the arms may be laid parallel, or, by taking out the pin, the parts may be separately stowed or shipped, and afterward joined with but little trouble.

Having thus described invention, I claim as new and desire to secure by Letters Patent- The shank C, provided with a recess, d', to receive the lug of the double-iluked arm, the recess having side walls, the inner sides and end walls of which afford bearings for the lug on opposite sides of the pivot, when the lukes are turned to either side, substantially as set forth.

ALPHONSO H. COBB.

Witnesses:

W. E. SEWELL, W. H. SLAcK. 

